2020Calendar of Astronomical Events

    
2020Phases of the Moon
Hawaiian Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Hawaiian Standard Time(Greenwich Mean Time - 10 hours).If Daylight Saving Time is in effect, add one hour to the times listed. 
   
      2020 Phases of the Moon   
      Hawaiian Standard Time
 New Moon  First Quarter  Full Moon  Last Quarter 
- Jan  2  18:45    Jan 10  09:21 n  Jan 17  02:58   
 Jan 24  11:42    Feb  1  15:42    Feb  8  21:33    Feb 15  12:17   
 Feb 23  05:32    Mar  2  09:57    Mar  9  07:48    Mar 15  23:34   
 Mar 23  23:28    Apr  1  00:21    Apr  7  16:35    Apr 14  12:56   
 Apr 22  16:26    Apr 30  10:38    May  7  00:45    May 14  04:03   
 May 22  07:39    May 29  17:30    Jun  5  09:12 n  Jun 12  20:24   
 Jun 20  20:41 A  Jun 27  22:16    Jul  4  18:44 n  Jul 12  13:29   
 Jul 20  07:33    Jul 27  02:32    Aug  3  05:59    Aug 11  06:45   
 Aug 18  16:41    Aug 25  07:58    Sep  1  19:22    Sep  9  23:26   
 Sep 17  01:00    Sep 23  15:55    Oct  1  11:05    Oct  9  14:39   
 Oct 16  09:31    Oct 23  03:23    Oct 31  04:49    Nov  8  03:46   
 Nov 14  19:07    Nov 21  18:45    Nov 29  23:30 n  Dec  7  14:37   
 Dec 14  06:17 T  Dec 21  13:41    Dec 29  17:28   -
An eclipse of the Sun can only occur at New Moon (see: Solar Eclipses for Beginners), while an eclipse of the Moon can only occur at Full Moon (see: Lunar Eclipses for Beginners). In any calendar year there are a minimum of two solar and two lunar eclipses.
If an eclipse of the Sun or Moon takes place on a given date, it is noted by a character next to the date in the table above. Solar eclipses are indicated as: T=Total, A=Annular, H=Hybrid and P=Partial.Lunar eclipses are indicated as: t=Total, p=Partial, and n=Penumbral. 
Phases of the Moon Photo Gallery is an image collection showing the Moon's phases over a complete synodic month.
2020Calendar of Astronomical Events
Hawaiian Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Hawaiian Standard Time(Greenwich Mean Time - 10 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
   
      2020Calendar of Astronomical Events   
   Hawaiian Standard Time  
 January - June   July - December 
Date     HST   Event        (h:m)Jan 01  15:30  Moon at Apogee: 404580 km    02  18:45  FIRST QUARTER MOON     03  23     Quadrantid Meteor Shower    04  22     Earth at Perihelion: 0.98324 AU    07  11:09  Aldebaran 3.0°S of Moon    09  13:29  Moon at Ascending Node     10  05     Mercury at Superior Conjunction     10  09:10  Pen. Lunar Eclipse; mag=0.896    10  09:21  FULL MOON     10  16:26  Pollux 5.3°N of Moon    11  13:54  Beehive 1.0°S of Moon    13  01:37  Regulus 3.8°S of Moon    13  04     Saturn in Conjunction with Sun     13  10:20  Moon at Perigee: 365964 km    17  02:58  LAST QUARTER MOON     17  13:03  Mars 4.7°N of Antares    20  09:13  Mars 2.3°S of Moon    22  10:31  Moon at Descending Node     22  16:42  Jupiter 0.4°N of Moon: Occn.    24  11:42  NEW MOON     27  21:29  Venus 4.1°N of Moon    29  11:28  Moon at Apogee: 405390 kmFeb 01  15:42  FIRST QUARTER MOON     03  20:53  Aldebaran 3.1°S of Moon    05  22:59  Moon at Ascending Node     07  02:58  Pollux 5.3°N of Moon    08  00:16  Beehive 1.0°S of Moon    08  21:33  FULL MOON     09  11:15  Regulus 3.8°S of Moon    10  04     Mercury at Greatest Elong: 18.2°E    10  10:31  Moon at Perigee: 360464 km    11  19     Mercury at Perihelion     15  12:17  LAST QUARTER MOON     18  03:18  Mars 0.8°S of Moon: Occn.    18  14:12  Moon at Descending Node     19  09:36  Jupiter 0.9°N of Moon: Occn.    20  03:47  Saturn 1.7°N of Moon    23  05:32  NEW MOON     25  16     Mercury at Inferior Conjunction     26  01:35  Moon at Apogee: 406277 kmMar 02  05:16  Aldebaran 3.3°S of Moon    02  09:57  FIRST QUARTER MOON     04  04:58  Moon at Ascending Node     05  13:26  Pollux 5.2°N of Moon    06  11:08  Beehive 1.1°S of Moon    07  22:23  Regulus 3.8°S of Moon    08  02     Neptune in Conjunction with Sun     09  07:48  FULL MOON     09  20:33  Moon at Perigee: 357123 km    15  23:34  LAST QUARTER MOON     16  15:00  Moon at Descending Node     17  22:19  Mars 0.7°N of Moon: Occn.    18  00:18  Jupiter 1.5°N of Moon    18  14:04  Saturn 2.1°N of Moon    19  17:50  Vernal Equinox     19  18     Venus at Perihelion     20  00     Mars 0.7°S of Jupiter    21  07:48  Mercury 3.6°N of Moon    23  16     Mercury at Greatest Elong: 27.8°W    23  23:28  NEW MOON     24  05:23  Moon at Apogee: 406690 km    24  12     Venus at Greatest Elong: 46.1°E    26  19     Mercury at Aphelion     29  11:52  Aldebaran 3.6°S of Moon    31  06:51  Moon at Ascending Node     31  10     Mars 0.9°S of SaturnApr 01  00:21  FIRST QUARTER MOON     01  21:59  Pollux 4.9°N of Moon    02  20:25  Beehive 1.3°S of Moon    03  04:36  Venus 0.3°S of Pleiades    04  08:45  Regulus 3.9°S of Moon    07  08:08  Moon at Perigee: 356909 km    07  16:35  FULL MOON     12  16:58  Moon at Descending Node     14  12:56  LAST QUARTER MOON     14  13:04  Jupiter 2.0°N of Moon    14  23:26  Saturn 2.5°N of Moon    15  18:33  Mars 2.0°N of Moon    20  09:01  Moon at Apogee: 406463 km    21  20     Lyrid Meteor Shower    22  16:26  NEW MOON     25  17:34  Aldebaran 3.8°S of Moon    26  00     Uranus in Conjunction with Sun     27  07:54  Moon at Ascending Node     29  04:19  Pollux 4.7°N of Moon    30  03:18  Beehive 1.6°S of Moon    30  10:38  FIRST QUARTER MOON May 01  16:49  Regulus 4.2°S of Moon    04  09     Eta-Aquarid Meteor Shower    04  11     Mercury at Superior Conjunction     05  17:03  Moon at Perigee: 359656 km    07  00:45  FULL MOON     08  11:40  Antares 6.5°S of Moon    09  18     Mercury at Perihelion     09  23:01  Moon at Descending Node     11  23:40  Jupiter 2.3°N of Moon    12  08:18  Saturn 2.7°N of Moon    14  04:03  LAST QUARTER MOON     14  16:00  Mars 2.8°N of Moon    17  16     Jupiter 4.8°S of Saturn    17  21:45  Moon at Apogee: 405584 km    22  00     Mercury 0.9°S of Venus    22  07:39  NEW MOON     23  16:40  Venus 3.7°N of Moon    24  00:53  Mercury 2.8°N of Moon    24  11:34  Moon at Ascending Node     26  09:43  Pollux 4.6°N of Moon    27  08:44  Beehive 1.7°S of Moon    28  22:44  Regulus 4.3°S of Moon    29  17:30  FIRST QUARTER MOON Jun 02  17:36  Moon at Perigee: 364366 km    03  08     Venus at Inferior Conjunction     04  03     Mercury at Greatest Elong: 23.6°E    05  09:12  FULL MOON     05  09:25  Pen. Lunar Eclipse; mag=0.568    06  08:10  Moon at Descending Node     08  07:19  Jupiter 2.2°N of Moon    08  16:19  Saturn 2.7°N of Moon    12  13:53  Mars 2.7°N of Moon    12  20:24  LAST QUARTER MOON     14  14:56  Moon at Apogee: 404597 km    18  22:52  Venus 0.7°S of Moon: Occn.    20  11:43  Summer Solstice     20  18:24  Moon at Ascending Node     20  20:40  Annular Solar Eclipse; mag=0.994    20  20:41  NEW MOON     22  15:53  Pollux 4.5°N of Moon    23  14:33  Beehive 1.7°S of Moon    25  04:09  Regulus 4.3°S of Moon    27  22:16  FIRST QUARTER MOON     29  16:09  Moon at Perigee: 368958 km    30  17     Mercury at Inferior Conjunction 
Date     HST   Event        (h:m)Jul 03  17:18  Moon at Descending Node     04  03     Earth at Aphelion: 1.01669 AU    04  18:30  Pen. Lunar Eclipse; mag=0.355    04  18:44  FULL MOON     05  11:37  Jupiter 1.9°N of Moon    05  22:45  Saturn 2.5°N of Moon    10  02     Venus at Aphelion     11  02:10  Venus 1.0°N of Aldebaran    11  09:36  Mars 2.0°N of Moon    12  09:27  Moon at Apogee: 404201 km    12  13:29  LAST QUARTER MOON     13  21     Jupiter at Opposition     16  15:21  Aldebaran 3.8°S of Moon    16  21:26  Venus 3.1°S of Moon    18  02:33  Moon at Ascending Node     18  17:54  Mercury 3.9°S of Moon    20  07:33  NEW MOON     20  12     Saturn at Opposition     22  05     Mercury at Greatest Elong: 20.1°W    22  10:50  Regulus 4.3°S of Moon    24  18:54  Moon at Perigee: 368367 km    27  02:32  FIRST QUARTER MOON     27  11     Delta-Aquarid Meteor Shower    30  23:32  Moon at Descending Node Aug 01  10:14  Mercury 6.6°S of Pollux    01  13:30  Jupiter 1.5°N of Moon    02  03:17  Saturn 2.3°N of Moon    02  23     Mars at Perihelion:  1.38138 AU    03  05:59  FULL MOON     05  18     Mercury at Perihelion     08  21:57  Mars 0.8°N of Moon: Occn.    09  03:51  Moon at Apogee: 404658 km    11  06:45  LAST QUARTER MOON     12  03     Perseid Meteor Shower    12  15     Venus at Greatest Elong: 45.8°W    13  00:06  Aldebaran 4.0°S of Moon    14  09:22  Moon at Ascending Node     15  03:01  Venus 4.0°S of Moon    16  09:10  Pollux 4.5°N of Moon    17  05     Mercury at Superior Conjunction     18  16:41  NEW MOON     21  00:59  Moon at Perigee: 363513 km    25  07:58  FIRST QUARTER MOON     25  18:04  Antares 6.2°S of Moon    27  01:52  Moon at Descending Node     28  15:33  Jupiter 1.4°N of Moon    29  06:40  Saturn 2.2°N of MoonSep 01  19:22  FULL MOON     05  18:42  Mars 0.0°S of Moon: Occn.    05  20:31  Moon at Apogee: 405606 km    09  08:12  Aldebaran 4.2°S of Moon    09  23:26  LAST QUARTER MOON     10  13:05  Moon at Ascending Node     11  09     Neptune at Opposition     12  14:10  Venus 2.5°S of Beehive    12  18:50  Pollux 4.3°N of Moon    13  17:19  Beehive 1.8°S of Moon    13  18:43  Venus 4.5°S of Moon    15  05:51  Regulus 4.3°S of Moon    17  01:00  NEW MOON     18  03:44  Moon at Perigee: 359081 km    18  17     Mercury at Aphelion     21  20:06  Mercury 0.3°N of Spica    22  00:27  Antares 6.0°S of Moon    22  03:31  Autumnal Equinox     23  02:33  Moon at Descending Node     23  15:55  FIRST QUARTER MOON     24  20:46  Jupiter 1.6°N of Moon    25  10:46  Saturn 2.3°N of MoonOct 01  06     Mercury at Greatest Elong: 25.8°E    01  11:05  FULL MOON     02  07:09  Venus 0.1°S of Regulus    02  17:21  Mars 0.7°N of Moon: Occn.    03  07:22  Moon at Apogee: 406321 km    06  15:02  Aldebaran 4.5°S of Moon    07  14:29  Moon at Ascending Node     09  14:39  LAST QUARTER MOON     10  03:18  Pollux 4.1°N of Moon    11  02:27  Beehive 2.1°S of Moon    12  15:59  Regulus 4.5°S of Moon    13  13     Mars at Opposition     13  13:57  Venus 4.3°S of Moon    16  09:31  NEW MOON     16  13:46  Moon at Perigee: 356913 km    19  09:12  Antares 5.7°S of Moon    20  05:53  Moon at Descending Node     20  19     Orionid Meteor Shower    22  07:10  Jupiter 2.0°N of Moon    22  17:49  Saturn 2.6°N of Moon    23  03:23  FIRST QUARTER MOON     25  08     Mercury at Inferior Conjunction     29  06:13  Mars 3.0°N of Moon    30  08:46  Moon at Apogee: 406393 km    30  11     Venus at Perihelion     31  04:49  FULL MOON     31  06     Uranus at Opposition Nov 01  17     Mercury at Perihelion     02  20:58  Aldebaran 4.6°S of Moon    03  16:39  Moon at Ascending Node     04  20     S Taurid Meteor Shower    06  09:52  Pollux 3.9°N of Moon    07  09:34  Beehive 2.3°S of Moon    08  03:46  LAST QUARTER MOON     09  00:20  Regulus 4.7°S of Moon    10  07     Mercury at Greatest Elong: 19.1°W    11  19     N Taurid Meteor Shower    12  11:30  Venus 3.1°S of Moon    13  10:45  Mercury 1.7°S of Moon    14  01:48  Moon at Perigee: 357839 km    14  19:07  NEW MOON     16  03:27  Venus 3.6°N of Spica    16  14:07  Moon at Descending Node     17  01     Leonid Meteor Shower    18  22:54  Jupiter 2.5°N of Moon    19  04:57  Saturn 2.9°N of Moon    21  18:45  FIRST QUARTER MOON     25  09:45  Mars 4.9°N of Moon    26  14:29  Moon at Apogee: 405891 km    29  23:30  FULL MOON     29  23:43  Pen. Lunar Eclipse; mag=0.829    30  03:07  Aldebaran 4.6°S of Moon    30  21:46  Moon at Ascending Node Dec 03  15:24  Pollux 3.8°N of Moon    04  15:10  Beehive 2.4°S of Moon    06  06:28  Regulus 4.8°S of Moon    07  14:37  LAST QUARTER MOON     12  10:40  Venus 0.8°S of Moon: Occn.    12  10:42  Moon at Perigee: 361777 km    13  15     Geminid Meteor Shower    14  01:03  Moon at Descending Node     14  06:13  Total Solar Eclipse; mag=1.025    14  06:17  NEW MOON     16  18:28  Jupiter 2.9°N of Moon    16  19:25  Saturn 3.1°N of Moon    19  17     Mercury at Superior Conjunction     21  00:03  Winter Solstice     21  13:41  FIRST QUARTER MOON     21  23     Ursid Meteor Shower    21  23     Jupiter 0.1°S of Saturn    23  04:48  Venus 5.5°N of Antares    23  08:30  Mars 5.6°N of Moon    24  06:32  Moon at Apogee: 405010 km    27  10:20  Aldebaran 4.6°S of Moon    28  05:03  Moon at Ascending Node     29  17:28  FULL MOON     30  21:41  Pollux 3.8°N of Moon    

 Terms Used in Astronomical Events Calendar 
  • Perihelion - instant when a planet is closest to the Sun
  • Aphelion - instant when a planet is furthest from the Sun
  • Perigee - instant when the Moon is closest to Earth
  • Apogee - instant when the Moon is furthest from Earth
  • Inferior Conjunction - instant when a planet (Mercury or Venus) passes between Earth and the Sun
  • Superior Conjunction - instant when a planet (Mercury or Venus) passes on the opposite side of the Sun from Earth 
  • Greatest Elongation - the maximum angular separation between the Sun and the planet (Mercury or Venus) as seen from Earth 
     - during eastern elongation (E), the planet appears as an evening star; 
     - during western elongation (W), the planet appears as a morning star
  • Opposition - instant when a planet appears opposite the Sun as seen from Earth
  • Conjunction - instant when a planet appears closest the Sun as seen from Earth
  • Occultation - the Moon occults or eclipses a star or planet
  • Ascending Node - point where the Moon crosses from the southern to northern portion of its orbit
  • Descending Node - point where the Moon crosses from the northern to the southern portion of its orbit

  • Aldebaran - bright star in the constellation Taurus
  • Pollux - bright star in the constellation Gemini
  • Regulus - bright star in the constellation Leo
  • Spica - bright star in the constellation Virgo
  • Antares - bright star in the constellation Scorpius
  • Pleiades - bright star cluster in the constellation Taurus
  • Beehive - bright star cluster in the constellation Cancer
Calendars of Astronomical Events: 2011 to 2020
The Americas
Below are links to calendars of astronomical events from 2011 to 2020 for seven time zones in the Americas. 
Choose a time zone and click on a year to get a calendar of astronomical events for that year.
   Calendars of Astronomical Events - The Americas
   AST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   EST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   CST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   MST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   PST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   AKST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   HST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
        Time Zones Abbreviations
        • AST = Atlantic Standard Time (= GMT - 4 hours)
        • EST = Eastern Standard Time (= GMT - 5 hours)
        • CST = Central Standard Time (= GMT - 6 hours)
        • MST = Mountain Standard Time (= GMT - 7 hours)
        • PST = Pacific Standard Time (= GMT - 8 hours)
        • AKST = Alaskan Standard Time (= GMT - 9 hours)
        • HST = Hawaiian Standard Time (= GMT - 10 hours)
           (where GMT = Greenwich Mean Time)
A time zone may have a different name in different countries. Note the difference in hours between a given time zone and Greenwich Mean Time to help in identification.
For other years and other time zones, visit: Calendars of Astronomical Events.
 
Accuracy of the Astronomical Events Calendars
The goal of the Astronomical Events Calendars is to present a wide range of solar system phenomena with reasonable accuracy. In general, events listed to the nearest hour are accurate to ± 30 minutes.Events listed with a precision in hours and minutes (i.e., hh:mm) are typically accurate to ± 5 minutes or less.  
The following table gives a more detailed breakdown of the accuracy of times for various astronomical events.
Accuracy of the Astronomical Events Calendars
 Solstice/Equinox (Earth)  ± 0.5 minute 
 Aphelion/Perihelion (Earth)  ± 30 minutes;  ± 0.00001 AU 
 Solar and Lunar Eclipses   ± 0.5 minute 
 Phases of the Moon  ± 0.5 minute 
 Moon at Nodes  ± 2 minutes 
 Apogee/Perigee of Moon  ± 5 minutes; ± 5 kilometers 
 Conjunctions of Moon with Star or Planet  ± 10 minutes 
 Conjunctions of Planet with Planet  ± 3 hours 
 Inferior/Superior Conjunctions (Mercury & Venus)  ± 30 minutes 
 Greatest Elongation (Mercury & Venus)  ± 30 minutes 
 Opposition/Conjunction (Outer Planets)  ± 3 hours 
 Aphelion/Perihelion of Planets  ± 30 minutes 

Acknowledgements
All calculations are by Fred Espenak and he assumes full responsibility for their accuracy. Algorithms used in predicting many of the astronomical events are based on Astronomical Algorithms by Jean Meeus (Willmann-Bell Inc. Richmond 1998). 
Permission is freely granted to reproduce this data when accompanied by the acknowledgment: 

Return to: Calendars of Astronomical Events
Return to: Planetary Ephemeris Data